摘要
采用高能球磨和冷轧工艺制备出3%(质量分数)碳纳米管增强Al5083复合材料。利用SEM,TEM观察球磨后复合粉末表面形貌,采用拉曼光谱和XRD对复合粉末和成型后的材料进行物相分析。最后测试了复合材料的力学性能。结果表明:在球磨1.5h的复合粉体中CNTs分散均匀,结构较完整,部分嵌入Al基体中并结合良好。冷压烧结并冷轧成型后的复合材料力学性能表现优异,球磨1.5h下,复合材料抗拉强度和屈服强度分别达到278MPa和247MPa,断裂延伸率为0.07,硬度HV达到95。将热不匹配模型与奥罗万模型所预测的屈服强度与实验值进行对比,结果表明CNTs/Al5083复合材料符合奥罗万机制。
The composite materials of 3%（mass fraction）carbon nanotubes（CNTs）/Al5083 were fabricated by high-energy ball milling and cold rolling.The surface morphology of the composite powder of ball milled was observed using SEM and TEM,the phase of composite powder and composite material were analyzed by Raman spectrum and XRD.Finally,the mechanical properties of composite material were tested.The results show that,the CNTs have a good structure and are well-distributed in the for 1.5h milled aluminum matrix.The composite material exhibits high strength for the tensile strength of 278 MPa,yield strength of 247 MPa and elongation rate of 0.07,Vickers hardness of 95.Compared with the predicted value of yield strength by thermal mismatch model and Orowan model,the experiment value indicates that the mechanism of CNTs/Al5083 accords with Orowan mechanism.
出处
《材料工程》
EI
CAS
CSCD
北大核心
2015年第8期1-6,共6页
Journal of Materials Engineering
关键词
金属基复合材料
高能球磨
碳纳米管
冷轧
metal matrix composite
high-energy ball milling
carbon nanotube
cold rolling
